John Hartman of the Doobie Brothers Drumsticks

Doobie Brothers co-founder John Hartman was initially the sole drummer in the band, but with the addition of Michael Hossack in 1971, the group switched to a dual drummer format, already used by the Grateful Dead and the Allman Brothers Band. Hartman first left the Doobie Brothers in 1979, re-joining sporadically until retiring from the group in 1992. Hossack passed away in 2012.